Guitar Hero 4 bands so far:
Allman Brothers
At the Drive-In
Billy Idol
Bon Jovi
Boston
Blind Melon
Blink-182
Creedence Clearwater Revival
Coldplay
Def Leppard
The Doors
Dream Theater
The Eagles
Fleetwood Mac
Foreigner
Interpol
Jane's Addiction
Jimi Hendrix
Jimmy Eat World
Lenny Kravitz
Linkin Park
Lynyrd Skynyrd
Michael Jackson
Modest Mouse
Muse
Nirvana
No Doubt
Oasis
Paramore
Steve Miller
Smashing Pumpkins
Sublime
Silversun Pickups
The Answer
Van Halen
And bands just added:
Ozzy Osbourne
Korn
System of a Down
Foo Fighters
Red Hot Chili Peppers
The Police